DC Motor and Incremental Encoder evaluation in the automated Factory
Budget: £10 – £20 GBP
Figure 1 depicts a material transfer unit in an automated factory. A conveyor, a DC motor, and an incremental encoder are used to move objects onto a platform in the unit. When an object reaches the platform, the conveyor stops and the object's height is measured with a laser triangulation unit.
An object is ramped up from rest to a steady speed of V m/s on the conveyor, then decelerated to zero with the same magnitude of acceleration using a DC motor and a gear unit with a step-down speed ratio of r = 4. The entire process takes T = 5s, the acceleration time is T = 1s, and the displacement is equal to the conveyor belt's length.
Figure 2 depicts a schematic representation of the system as well as the speed profile of the object. In each servo loop, an optical incremental encoder provides position and velocity feedback.
What is the required resolution for the incremental encoder in the system? What is the smallest word size required for encoder output? When the conveyor is running at a constant speed, what is the velocity resolution? Determine the significance of the eccentricity error. Quadrature signals are available
An object is ramped up from rest to a steady speed of V m/s on the conveyor, then decelerated to zero with the same magnitude of acceleration using a DC motor and a gear unit with a step-down speed ratio of r = 4. The entire process takes T = 5s, the acceleration time is T = 1s, and the displacement is equal to the conveyor belt's length.
Figure 2 depicts a schematic representation of the system as well as the speed profile of the object. In each servo loop, an optical incremental encoder provides position and velocity feedback.
What is the required resolution for the incremental encoder in the system? What is the smallest word size required for encoder output? When the conveyor is running at a constant speed, what is the velocity resolution? Determine the significance of the eccentricity error. Quadrature signals are available